If you are looking for air clean filters, then here are the replacemen filters: https://www.ezvacuum.com/miele-super-air-clean-vacuum-filter-for-s300s600-generic-p-2056.html. You can also let me know the model number and I will tell you which one will fit.
We also have the same bags in smaller packaging. https://www.ezvacuum.com/replacement-miele-type-f-j-m-fjm-filtrete-3m-vacuum-cleaner-dustbags-5-bags-2-filters-replaces-miele-part-7291640.html